US20160070095A1 - Projector - Google Patents
Projector Download PDFInfo
- Publication number
- US20160070095A1 US20160070095A1 US14/845,280 US201514845280A US2016070095A1 US 20160070095 A1 US20160070095 A1 US 20160070095A1 US 201514845280 A US201514845280 A US 201514845280A US 2016070095 A1 US2016070095 A1 US 2016070095A1
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- United States
- Prior art keywords
- color wheel
- projector
- rotary
- curved surface
- mount
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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- G03B21/2093—
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
- G03B33/08—Sequential recording or projection
Definitions
- the invention relates to a projector, and especially relates to a projector using a color wheel and a color wheel module therefor.
- the color wheel of a color wheel module is driven by a motor.
- the rotation angular position of the color wheel is determined by using an optical sensor to detect a mark label attached on a rotation shaft of the motor.
- the motor is fixed usually by a fixing part made of a metal plate.
- the optical sensor is usually fixed on the fixing part.
- the optical sensor is separate from the motor, so a deposition of dust on the optical sensor is unavoidable. When the optical sensor is covered with the dust of a certain amount or thickness, the optical sensor probably fails.
- Some color wheel modules with a blocking structure are available in the field. The blocking structure is disposed close to the rotation shaft of the motor and adjacent to the optical sensor.
- An objective of the invention is to provide a projector with a color wheel module that can increase flowing resistance by narrowing a fluid passage so that an airflow in the fluid passage is deflected from a direction toward the optical sensor for further reducing the amount of dust deposited on the optical sensor.
- a projector includes a color wheel module for producing a color light, and an optical engine for receiving the color light.
- the color wheel module includes a rotation device, a mount, a color wheel, and an optical sensor.
- the rotation device is fixed on the mount and includes a rotary part.
- the rotary part has a rotary surface rotating in a rotation direction.
- the mount includes an anti-dust structure having a curved surface.
- the curved surface is opposite to the rotary surface and extends in the rotation direction.
- the curved surface has a first section and a second section sequentially in the rotation direction.
- the first section and the rotary surface form a first distance therebetween; the second section and the rotary surface forma second distance therebetween.
- the first distance is larger than the second distance.
- the color wheel is fixed on the rotary part.
- the optical sensor is fixed on the mount and has a sensing surface toward the rotary surface.
- the curved surface and the sensing surface are arranged sequentially in the rotation direction. Thereby, the curved surface and the rotary surface form a narrow passage therebetween.
- An airflow induced by the rotary surface due to the rotation of the rotary part is subjected to a constraint by the narrow passage, so only a small part of the airflow can flow through the narrow passage and reach the sensing surface. Therefore, the amount of dust deposited on the sensing surface is efficiently reduced.
- the narrow passage provides a larger resistance to the airflow in the narrow passage at the second section than at the first section, so that when flowing at the second section, the airflow tends to flow out from two opposite sides of the narrow passage.
- only a part of the airflow entering the narrow passage can flow past the second section and reach the sensing surface, so that the amount of the dust deposited on the sensing surface can be reduced further, which enhances the anti-dust effect of the anti-dust structure and solves the problem in the prior art that the blocking structure can do nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- Another objective of the invention is to provide a projector with a color wheel module that includes a guiding slot beside its curved surface so that an airflow in a fluid passage of the color wheel module tends to flow toward the guiding slot and be deflected from a direction to the optical sensor for further reducing the amount of dust deposited on the optical sensor.
- a projector includes a color wheel module for producing a color light, and an optical engine for receiving the color light.
- the color wheel module includes a rotation device, a mount, a color wheel, and an optical sensor.
- the rotation device is fixed on the mount and includes a rotary part.
- the rotary part has a rotary surface rotating in a rotation direction.
- the mount includes an anti-dust structure.
- the anti-dust structure has a curved surface and a guiding slot.
- the curved surface is opposite to the rotary surface and extends in the rotation direction.
- the guiding slot is disposed beside the curved surface, is lower than the curved surface, and extends substantially in the rotation direction.
- the color wheel is fixed on the rotary part.
- the optical sensor is fixed on the mount and has a sensing surface toward the rotary surface.
- the curved surface and the sensing surface are arranged sequentially in the rotation direction. Thereby, the rotary surface and the curved surface with the guiding slot form a narrow passage therebetween.
- An airflow induced by the rotary surface due to the rotation of the rotary part is subjected to a constraint by the narrow passage, so only a small part of the airflow can flow through the narrow passage and reach the sensing surface. Therefore, the amount of dust deposited on the sensing surface is efficiently reduced.
- the narrow passage provides a lower resistance to the airflow in a portion of the narrow passage, corresponding to the guiding slot, than in a portion of the narrow passage, corresponding to the curved surface, so that the airflow in the narrow passage tends to flow toward the guiding slot.
- only a part of the airflow entering the narrow passage can flow past the second section in the rotation direction and reach the sensing surface, so that the amount of the dust deposited on the sensing surface can be reduced further, which enhances the anti-dust effect of the anti-dust structure and solves the problem in the prior art that the blocking structure can do nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- FIG. 1 is a schematic diagram illustrating a projector of an embodiment according to the invention.
- FIG. 2 is an assembly drawing of a color wheel module and a projection lens coupled to an optical engine of the projector in FIG. 1 .
- FIG. 3 is an exploded view of the color wheel module and the optical engine in FIG. 2 .
- FIG. 4 is a schematic diagram illustrating the color wheel module in FIG. 3 in another viewpoint.
- FIG. 5 is an exploded view of the color wheel module in FIG. 4 .
- FIG. 6 is a front view of the color wheel module in FIG. 4 .
- FIG. 7 is a schematic diagram illustrating the color wheel module in FIG. 4 without a rotation device in another viewpoint.
- FIG. 8 is a schematic diagram illustrating a color wheel module without a rotation device according to an embodiment.
- FIG. 9 is a side view of the assembly of the optical engine, the color wheel module, and an apparatus casing in FIG. 1 .
- FIG. 10 is a side view of the color wheel module in FIG. 9 .
- FIG. 11 is an assembly drawing of an optical engine, a color wheel module coupled to the optical engine, and the projection lens of another embodiment according to the invention.
- FIG. 12 is an exploded view of the color wheel module and the optical engine in FIG. 11 .
- FIG. 13 is a schematic diagram illustrating amount of the color wheel module in FIG. 13 .
- FIG. 1 is a schematic diagram illustrating a projector 1 of an embodiment according to the invention.
- the projector 1 includes an apparatus casing 10 , a light module 12 , an optical engine 14 , a color wheel module 16 , and a projection lens 18 .
- the light module 12 , the optical engine 14 , the color wheel module 16 , and a portion of the projection lens 18 are disposed in the apparatus casing 10 .
- the light module 12 , the color wheel module 16 , and the projection lens 18 are coupled to the optical engine 14 .
- the projection lens 18 protrudes out of the apparatus casing 10 from an opening 102 of the apparatus casing 10 .
- the light module 12 and some components of the optical engine 14 are shown by rectangles.
- the light module 12 provides light that is filtered through the color wheel module 16 to form various color lights that are received and modulated by the optical engine 14 and then projected in a projection direction 18 a onto a screen by the projection lens 18 so as to form an image.
- FIG. 2 is an assembly drawing of the color wheel module 16 and the projection lens 18 which are coupled to the optical engine 14 .
- FIG. 3 is an exploded view of the color wheel module 16 and the optical engine 14 .
- FIG. 4 is a schematic diagram illustrating the color wheel module 16 in another viewpoint.
- FIG. 5 is an exploded view of the color wheel module 16 .
- the optical engine 14 includes a housing 142 .
- the housing 142 has an accommodating space 1422 , a first opening 1424 , and a second opening 1426 .
- the first opening 1424 and the second opening 1426 are opposite to each other and connect with the accommodating space 1422 . From the viewpoint of FIG.
- the color wheel module 16 is disposed in the accommodating space 1422 by inserting the color wheel module 16 from above of the optical engine 14 downward through the first opening 1424 into the accommodating space 1422 .
- the color wheel module 16 includes a rotation device 162 , a mount 164 , a color wheel 166 , and a rotation sensing module 168 .
- the rotation device 162 can be but not limited to a motor and a control circuit therefor.
- the rotation device 162 includes a rotary part 1622 and a control circuit 1624 .
- the control circuit 1624 is used for controlling the rotation of the rotary part 1622 .
- the rotary part 1622 has a rotary surface 1622 a that rotates in a rotation direction 1622 b (indicated by an arrow in FIG.
- the mount 164 includes a cover 1642 , a fixing part 1644 , and an anti-dust structure 1646 .
- the rotation device 162 is fixed through a vibration reducer 170 to the fixing part 1644 .
- the cover 1642 is connected to the fixing part 1644 .
- the anti-dust structure 1646 is disposed on the fixing part 1644 and has a curved surface 16462 and a guiding slot 16464 .
- the curved surface 16462 is opposite to the rotary surface 1622 a and extends in the rotation direction 1622 b.
- the guiding slot 16464 is disposed beside the curved surface 16462 a and is lower than the curved surface 16462 .
- the guiding slot 16464 extends substantially in the rotation direction 1622 b .
- the curved surface 16462 and the guiding slot 16464 are toward the rotary surface 1622 a so that a narrow passage is formed between the rotary surface 1622 a and the curved surface 16462 with the guiding slot 16464 .
- the portion of the anti-dust structure 1646 that faces the rotary surface 1622 a can be taken as the curved surface 16462 , on which the guiding slot 16464 is formed.
- the color wheel 166 is fixed on the rotary part 1622 , so that the color wheel 166 rotates together with the rotary part 1622 .
- the rotation sensing module 168 includes a control circuit 1682 and an optical sensor 1684 fixed on the control circuit 1682 .
- the optical sensor 1684 has a sensing surface 1684 a.
- the rotation sensing module 168 is fixed on the fixing part 1644 , so that the sensing surface 1684 a is toward the rotary surface 1622 a and therefore can sense the rotation of the rotary surface 1622 a.
- the fixing part 1644 has a through hole 1644 a.
- the control circuit 1682 e.g. but not limited to a circuit board module
- the control circuit 1682 is fixed on the fixing part 1644 from the bottom thereof in the viewpoint of FIG. 4 , so that the optical sensor 1684 is fixed on the fixing part 1644 through the control circuit 1682 and accommodated in the through hole 1644 a.
- FIG. 6 is a front view of the color wheel module 16 ; therein, the fixing part 1644 is shown with being partially cut.
- the curved surface 16462 and the sensing surface 1684 a are arrange sequentially in the rotation direction 1622 b (indicated by an arrow in FIG. 6 ). From the viewpoint of FIG. 6 , the space between the anti-dust structure 1646 and the rotary surface 1622 a is the narrow passage mentioned above.
- the sensing surface 1684 a is lower than an extension line (as shown by a dash line in FIG. 7 ) of the curved surface 16462 , which keeps the airflow that passes through the narrow passage from directly hitting the sensing surface 1684 a and reduces the amount of the dust deposited on the sensing surface 1684 a.
- FIG. 7 is a schematic diagram illustrating the color wheel module 16 in another viewpoint.
- the rotation device 162 and the color wheel 166 are omitted, and a distance between the guiding slot 16464 and the rotary surface 1622 a is larger than that between the curved surface 16462 and the rotary surface 1622 a.
- a flowing resistance to the airflow flowing between the guiding slot 16464 and the rotary surface 1622 a is relatively small, so that after entering the narrow passage formed by the rotary surface 1622 a and the curved surface 16462 with the guiding slot 16464 , the airflow tends to flow between the guiding slot 16464 and the rotary surface 1622 a.
- an extension line (as shown by a bold dashed line with an arrow in FIG. 7 ) of the guiding slot 16464 does not pass through the sensing surface 1684 a of the optical sensor 1684 . Therefore, in principle, the airflow flowing substantially in the rotation direction 1622 b (indicated by a bold arrow in FIG. 7 ) between the guiding slot 16464 and the rotary surface 1622 a will not impact on the sensing surface 1684 a after departing from the narrow passage; the dust contained in this airflow will not be deposited on the sensing surface 1684 a.
- the guiding slot 16464 solves the problem in the prior art that the blocking structure does nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- the curved surface 16462 has a first section 16462 a and a second section 16462 b (of which the areas are indicated by dashed rectangles in FIG. 7 ) sequentially in the rotation direction 1622 b.
- the first section 16462 a and the rotary surface 1622 a form a first distance 16463 a therebetween.
- the second section 16462 b and the rotary surface 1622 a form a second distance 16463 b therebetween.
- the first distance 16463 a is larger than the second distance 16463 b .
- the curved surface 16462 is disposed substantially parallel to the rotary surface 1622 a.
- the distance between the curved surface 16462 and the rotary surface 1622 a varies gradually so as to reduce turbulence of the airflow.
- an average of the distance between the first section 16462 a and the rotary surface 1622 a can be taken as the above first distance 16463 a; an average of the distance between the second section 16462 b and the rotary surface 1622 a can be taken as the above second distance 16463 b.
- the invention is not limited thereto.
- the first distance 16463 a is larger than the second distance 16463 b, so the airflow that flows between the curved surface 16462 and the rotary surface 1622 a will be subjected to a higher flowing resistance at the second section 16462 b than at the first section 16462 a.
- the airflow largely tends to flow out from two opposite sides of the second section 16462 b when flowing at the second section 16462 b. In other words, a little of the airflow can pass through the narrow passage (formed between the curved surface 16462 and the rotary surface 1622 a ), the second section 16462 b in the rotation direction 1622 b, and reach the sensing surface 1684 a.
- the distance between the curved surface 16462 and the rotary surface 1622 a becomes narrow gradually, a little of the airflow having entered the narrow passage will flow above the sensing surface 1684 a, and the amount of the dust deposited on the sensing surface can be reduced further. Therefore, shortening the distance between the curved surface 16462 and the rotary surface 1622 a also solves the problem in the prior art that the blocking structure does nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- the anti-dust structure 1646 provides a dual effect on reducing the deposition of dust on the sensing surface 1684 a by the guiding slot 16464 and by gradually shortening the distance between the curved surface 16462 and the rotary surface 1622 a; however, the invention is not limited thereto. In practice, it is practicable to choose either one of the aforementioned features on the anti-dust structure. Furthermore, in practice, the longer the narrow passage formed between the rotary surface 1622 a and the curved surface 16462 with the guiding slot 16464 in the rotation direction 1622 b, the better the guiding effect on the airflow having entered the narrow passage (i.e. avoiding the airflow impacting the sensing surface 1684 a ).
- the curved surface 16462 extends in the rotation direction 1622 b by at least 45 degrees; that is, the curved surface 16462 covers the rotary surface 1622 a in the rotation direction 1622 b by at least 45 degrees.
- the invention is not limited thereto.
- the guiding slot 16464 is wholly adjacent to and connects with the curved surface 16462 , but the invention is not limited thereto.
- the guiding slot 16474 of the anti-dust structure 1647 is partially adjacent to the curved surface 16462 and therefore connects with the first section 16462 a only.
- the other portion of the guiding slot 16474 extends in a direction diverging from the rotation direction 1622 b and even from the rotary surface 1622 a; that is, the other portion of the guiding slot 16474 does not face the rotary surface 1622 a.
- This structural configuration leads the airflow, which departs from the anti-dust structure 1647 through the guiding slot 16474 , to move far away from the sensing surface 1684 a; that is further reducing the influence of the airflow on the sensing surface 1684 a (e.g. the deposition of the dust, contained in the airflow, on the sensing surface 1684 a ).
- FIG. 9 is a side view of the assembly of the optical engine 14 , the color wheel module 16 , and the apparatus casing 10 .
- FIG. 10 is a side view of the color wheel module 16 .
- the fixing part 1644 has two locking holes 1644 b and 1644 c.
- the cover 1642 has a locking hole 1642 a disposed on the same axis as the locking hole 1644 b; in the embodiment, the locking holes 1644 b and 1642 a are substantially concyclic.
- the housing 142 of the optical engine 14 has two locking holes 1428 a and 1428 b correspondingly.
- the color wheel module 16 is fixed to the optical engine 14 by the locking holes 1644 b, 1644 c, 1642 a, 1428 a and 1428 b , e.g. with screws.
- the locking holes 1644 b and 1642 a are aligned with the locking hole 1428 a of the housing 142 at the first opening 1424 ;
- the locking hole 1644 c is aligned with the locking hole 1428 b in the accommodating space 1422 .
- the second opening 1426 is toward a bottom wall of the apparatus casing 10 and separately disposed from the bottom wall; that is, a gap exists therebetween, which is conducive to heat dissipation of the color wheel module 16 .
- the locking holes 1644 b and 1642 a have the same center line 1648 (indicated by a center line in FIG. 3 and FIG. 7 and by a cross mark in FIG. 10 ).
- a projection space 1650 (indicated by a column in dashed lines in FIG. 3 and shown as the area formed by the profile of the locking holes 1644 b and 1642 a in FIG. 10 ) is defined by the locking hole 1644 b or 1642 a extending along the center line 1648 .
- the rotary part 1622 has a rotation axis 1622 c passing through the projection space 1650 .
- a projection of the rotation axis 1622 c on the mount 164 in a direction parallel to the center line 1648 passes through the locking holes 1644 b and 1642 a .
- a torque to the housing 142 (especially the portion of the housing 142 where the fixing part 1644 is connected by the locking holes 1644 b and 1642 a ), that is produced due to the rotation of the rotary part 1622 , is reduced so as to enhance the stability of the rotation of the rotary part 1622 relative to the optical engine 14 .
- the rotation axis 1622 c also passes through a projection space (shown as the area by the profile of the locking hole 1644 c in FIG.
- the locking holes 1644 b, 1644 c and 1642 a and the rotation axis 1622 care disposed to be substantially coplanar (i.e.
- the center lines 1648 and 1649 and the rotation axis 1622 c are coplanar), and the locking holes 1644 b, 1644 c and 1642 a are located at two opposite sides of the rotary part 1622 , so that the color wheel module 16 is firmly fixed by the optical engine 14 and the rotary part 1622 can stably rotate.
- the mount 164 has a side wall portion 1642 b formed by the cover 1642 .
- the side wall portion 1642 b substantially seals the first opening 1424 of the housing 142 .
- a gap allowing a fixing tool e.g. a screwdriver to pass through is formed between the side wall portion 1642 b and the first opening 1424 and facilitates the fixing of the fixing part 1644 on the housing 142 by the locking hole 1644 c.
- the side wall portion 1642 b can be designed to seal the first opening 1424 completely for further improving the sealing of the accommodating space.
- FIG. 11 is an assembly drawing of an optical engine 34 , a color wheel module 36 coupled to the optical engine 34 , and the projection lens 18 of another embodiment according to the invention.
- FIG. 12 is an exploded view of the color wheel module and the optical engine 34 .
- FIG. 13 is a schematic diagram illustrating a mount 364 of the color wheel module 36 .
- the optical engine 34 and the color wheel module 36 are structurally similar to the optical engine 14 and the color wheel module 16 in the above-mentioned embodiment respectively. Therefore, in principle, the optical engine 34 and the color wheel module 36 use the component notations of the optical engine 14 and the color wheel module 16 .
- the mount 364 of the color wheel module 36 is integrally formed in one piece, for example but not limited to a plastic injection part. Thereby, the mount 364 as a whole can provide better precision, which can easily and precisely control the relative position of the curved surface 16462 of the anti-dust structure 3646 of the mount 364 and the rotary surface 1622 a.
- the anti-dust structure 3646 of the mount 364 has a side surface 16476 and an accommodating recess 16477 .
- the side surface 16476 is opposite to the color wheel 166 (shown by its profile in dashed lines in FIG. 13 ).
- the accommodating recess 16477 is formed on the side surface 16476 .
- the color wheel 166 covers at least a portion of the accommodating recess 16477 .
- dust contained in an airflow induced between the color wheel 166 and the side surface 16476 due to the rotation of the color wheel 166 can be deposited in the accommodating recess 16477 , which is conducive to a reduction in the amount of the dust contained in the air inside the accommodating space 1422 .
- the anti-dust structure 1646 of the color wheel module 16 can be provided with a structure like the accommodating recess 16477 and performs the same effect, which will not be repeated.
- the control circuit 1682 of the rotation sensing module 168 is fixed on the mount 364 from the bottom thereof (in the viewpoint of FIG. 13 ), and the mount 364 has a through hole 16478 corresponding to the control circuit 1682 beside the curved surface 16462 , so the optical sensor 1684 can be exposed through the through hole 16478 for sensing the rotation of the rotary surface 1622 a.
- the optical sensor 1684 (indicated by dashed lines in FIG. 13 ) is located in the through hole 16478 .
- the sensing surface 1684 a of the optical sensor 1684 is lower than the opening edge of the through hole 16478 and an extension of the curved surface 16462 , which keeps the airflow passing through the narrow passage from directly hitting the sensing surface 1684 a and also reduces the amount of the dust deposited on the sensing surface 1684 a.
- the mount 364 has an accommodating recess 16479 adjacent to the through hole 16478 at one end of the guiding slot 16474 .
- the airflow passing through the narrow passage formed between the anti-dust structure 3646 and the rotary surface 1622 a, flows out the narrow passage from the guiding slot 16474 , so that the dust contained in the portion of the airflow can be deposited in the accommodating recess 16479 and will not be spread in the accommodating space 1422 by the portion of the airflow, which indirectly reduces the amount of the dust in the airflow induced by the rotary surface 1622 a of the rotary part 1622 .
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Abstract
Description
- 1. Field of the Invention
- The invention relates to a projector, and especially relates to a projector using a color wheel and a color wheel module therefor.
- 2. Description of the Prior Art
- For conventional projectors using a color wheel for splitting light, the color wheel of a color wheel module is driven by a motor. The rotation angular position of the color wheel is determined by using an optical sensor to detect a mark label attached on a rotation shaft of the motor. The motor is fixed usually by a fixing part made of a metal plate. The optical sensor is usually fixed on the fixing part. However, the optical sensor is separate from the motor, so a deposition of dust on the optical sensor is unavoidable. When the optical sensor is covered with the dust of a certain amount or thickness, the optical sensor probably fails. Some color wheel modules with a blocking structure are available in the field. The blocking structure is disposed close to the rotation shaft of the motor and adjacent to the optical sensor. An airflow induced by the rotation of the rotation shaft of the motor is mostly blocked by the blocking structure so that the probability of depositing dust on the optical sensor can be reduced. However, in practice, under a consideration to the mechanical movement of the rotation shaft of the motor (e.g. the rotation stability of the rotation shaft, a reduction of the rotation stability due to abrasion of the rotation shaft and so on), the blocking structure cannot be disposed unlimitedly close to the rotation shaft. That is, there must be a certain airflow between the blocking structure and the rotation shaft. Furthermore, there are no other mechanisms of reducing the deposition of dust in the above configuration to the airflow having entered between the blocking structure and the rotation shaft. Therefore, the efficiency of reducing the deposition of dust by the configuration is limited.
- An objective of the invention is to provide a projector with a color wheel module that can increase flowing resistance by narrowing a fluid passage so that an airflow in the fluid passage is deflected from a direction toward the optical sensor for further reducing the amount of dust deposited on the optical sensor.
- A projector according to invention includes a color wheel module for producing a color light, and an optical engine for receiving the color light. The color wheel module includes a rotation device, a mount, a color wheel, and an optical sensor. The rotation device is fixed on the mount and includes a rotary part. The rotary part has a rotary surface rotating in a rotation direction. The mount includes an anti-dust structure having a curved surface. The curved surface is opposite to the rotary surface and extends in the rotation direction. The curved surface has a first section and a second section sequentially in the rotation direction. The first section and the rotary surface form a first distance therebetween; the second section and the rotary surface forma second distance therebetween. The first distance is larger than the second distance. The color wheel is fixed on the rotary part. The optical sensor is fixed on the mount and has a sensing surface toward the rotary surface. The curved surface and the sensing surface are arranged sequentially in the rotation direction. Thereby, the curved surface and the rotary surface form a narrow passage therebetween. An airflow induced by the rotary surface due to the rotation of the rotary part is subjected to a constraint by the narrow passage, so only a small part of the airflow can flow through the narrow passage and reach the sensing surface. Therefore, the amount of dust deposited on the sensing surface is efficiently reduced. Furthermore, the narrow passage provides a larger resistance to the airflow in the narrow passage at the second section than at the first section, so that when flowing at the second section, the airflow tends to flow out from two opposite sides of the narrow passage. In other words, only a part of the airflow entering the narrow passage can flow past the second section and reach the sensing surface, so that the amount of the dust deposited on the sensing surface can be reduced further, which enhances the anti-dust effect of the anti-dust structure and solves the problem in the prior art that the blocking structure can do nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- Another objective of the invention is to provide a projector with a color wheel module that includes a guiding slot beside its curved surface so that an airflow in a fluid passage of the color wheel module tends to flow toward the guiding slot and be deflected from a direction to the optical sensor for further reducing the amount of dust deposited on the optical sensor.
- A projector according to invention includes a color wheel module for producing a color light, and an optical engine for receiving the color light. The color wheel module includes a rotation device, a mount, a color wheel, and an optical sensor. The rotation device is fixed on the mount and includes a rotary part. The rotary part has a rotary surface rotating in a rotation direction. The mount includes an anti-dust structure. The anti-dust structure has a curved surface and a guiding slot. The curved surface is opposite to the rotary surface and extends in the rotation direction. The guiding slot is disposed beside the curved surface, is lower than the curved surface, and extends substantially in the rotation direction. The color wheel is fixed on the rotary part. The optical sensor is fixed on the mount and has a sensing surface toward the rotary surface. The curved surface and the sensing surface are arranged sequentially in the rotation direction. Thereby, the rotary surface and the curved surface with the guiding slot form a narrow passage therebetween. An airflow induced by the rotary surface due to the rotation of the rotary part is subjected to a constraint by the narrow passage, so only a small part of the airflow can flow through the narrow passage and reach the sensing surface. Therefore, the amount of dust deposited on the sensing surface is efficiently reduced. Furthermore, the narrow passage provides a lower resistance to the airflow in a portion of the narrow passage, corresponding to the guiding slot, than in a portion of the narrow passage, corresponding to the curved surface, so that the airflow in the narrow passage tends to flow toward the guiding slot. In other words, only a part of the airflow entering the narrow passage can flow past the second section in the rotation direction and reach the sensing surface, so that the amount of the dust deposited on the sensing surface can be reduced further, which enhances the anti-dust effect of the anti-dust structure and solves the problem in the prior art that the blocking structure can do nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft.
- These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
-
FIG. 1 is a schematic diagram illustrating a projector of an embodiment according to the invention. -
FIG. 2 is an assembly drawing of a color wheel module and a projection lens coupled to an optical engine of the projector inFIG. 1 . -
FIG. 3 is an exploded view of the color wheel module and the optical engine inFIG. 2 . -
FIG. 4 is a schematic diagram illustrating the color wheel module inFIG. 3 in another viewpoint. -
FIG. 5 is an exploded view of the color wheel module inFIG. 4 . -
FIG. 6 is a front view of the color wheel module inFIG. 4 . -
FIG. 7 is a schematic diagram illustrating the color wheel module inFIG. 4 without a rotation device in another viewpoint. -
FIG. 8 is a schematic diagram illustrating a color wheel module without a rotation device according to an embodiment. -
FIG. 9 is a side view of the assembly of the optical engine, the color wheel module, and an apparatus casing inFIG. 1 . -
FIG. 10 is a side view of the color wheel module inFIG. 9 . -
FIG. 11 is an assembly drawing of an optical engine, a color wheel module coupled to the optical engine, and the projection lens of another embodiment according to the invention. -
FIG. 12 is an exploded view of the color wheel module and the optical engine inFIG. 11 . -
FIG. 13 is a schematic diagram illustrating amount of the color wheel module inFIG. 13 . - Please refer to
FIG. 1 , which is a schematic diagram illustrating aprojector 1 of an embodiment according to the invention. Theprojector 1 includes anapparatus casing 10, alight module 12, anoptical engine 14, acolor wheel module 16, and aprojection lens 18. Thelight module 12, theoptical engine 14, thecolor wheel module 16, and a portion of theprojection lens 18 are disposed in theapparatus casing 10. Thelight module 12, thecolor wheel module 16, and theprojection lens 18 are coupled to theoptical engine 14. Theprojection lens 18 protrudes out of the apparatus casing 10 from anopening 102 of theapparatus casing 10. Therein, thelight module 12 and some components of theoptical engine 14 are shown by rectangles. Thelight module 12 provides light that is filtered through thecolor wheel module 16 to form various color lights that are received and modulated by theoptical engine 14 and then projected in aprojection direction 18 a onto a screen by theprojection lens 18 so as to form an image. - Please also refer to
FIG. 2 toFIG. 5 .FIG. 2 is an assembly drawing of thecolor wheel module 16 and theprojection lens 18 which are coupled to theoptical engine 14.FIG. 3 is an exploded view of thecolor wheel module 16 and theoptical engine 14.FIG. 4 is a schematic diagram illustrating thecolor wheel module 16 in another viewpoint.FIG. 5 is an exploded view of thecolor wheel module 16. Theoptical engine 14 includes ahousing 142. Thehousing 142 has anaccommodating space 1422, afirst opening 1424, and asecond opening 1426. Thefirst opening 1424 and thesecond opening 1426 are opposite to each other and connect with theaccommodating space 1422. From the viewpoint ofFIG. 3 , thecolor wheel module 16 is disposed in theaccommodating space 1422 by inserting thecolor wheel module 16 from above of theoptical engine 14 downward through thefirst opening 1424 into theaccommodating space 1422. Thecolor wheel module 16 includes arotation device 162, amount 164, acolor wheel 166, and arotation sensing module 168. Therotation device 162 can be but not limited to a motor and a control circuit therefor. Therotation device 162 includes arotary part 1622 and acontrol circuit 1624. Thecontrol circuit 1624 is used for controlling the rotation of therotary part 1622. Therotary part 1622 has arotary surface 1622 a that rotates in arotation direction 1622 b (indicated by an arrow inFIG. 3 andFIG. 5 ). Themount 164 includes acover 1642, a fixingpart 1644, and ananti-dust structure 1646. Therotation device 162 is fixed through avibration reducer 170 to the fixingpart 1644. Thecover 1642 is connected to the fixingpart 1644. Theanti-dust structure 1646 is disposed on the fixingpart 1644 and has acurved surface 16462 and a guidingslot 16464. Thecurved surface 16462 is opposite to therotary surface 1622 a and extends in therotation direction 1622 b. The guidingslot 16464 is disposed beside thecurved surface 16462 a and is lower than thecurved surface 16462. The guidingslot 16464 extends substantially in therotation direction 1622 b. Thecurved surface 16462 and the guidingslot 16464 are toward therotary surface 1622 a so that a narrow passage is formed between therotary surface 1622 a and thecurved surface 16462 with the guidingslot 16464. In the embodiment, in principle, the portion of theanti-dust structure 1646 that faces therotary surface 1622 a can be taken as thecurved surface 16462, on which theguiding slot 16464 is formed. Thecolor wheel 166 is fixed on therotary part 1622, so that thecolor wheel 166 rotates together with therotary part 1622. - The
rotation sensing module 168 includes acontrol circuit 1682 and anoptical sensor 1684 fixed on thecontrol circuit 1682. Theoptical sensor 1684 has asensing surface 1684 a. Therotation sensing module 168 is fixed on the fixingpart 1644, so that thesensing surface 1684 a is toward therotary surface 1622 a and therefore can sense the rotation of therotary surface 1622 a. In the embodiment, the fixingpart 1644 has a throughhole 1644 a. The control circuit 1682 (e.g. but not limited to a circuit board module) is fixed on the fixingpart 1644 from the bottom thereof in the viewpoint ofFIG. 4 , so that theoptical sensor 1684 is fixed on the fixingpart 1644 through thecontrol circuit 1682 and accommodated in the throughhole 1644 a. Thesensing surface 1684 a is exposed through the throughhole 1644 a and faces therotary surface 1622 a, so that theoptical sensor 1684 senses the rotation of therotary surface 1622 a (or the rotary part 1622) through thesensing surface 1684 a. Please also refer toFIG. 6 .FIG. 6 is a front view of thecolor wheel module 16; therein, the fixingpart 1644 is shown with being partially cut. Thecurved surface 16462 and thesensing surface 1684 a are arrange sequentially in therotation direction 1622 b (indicated by an arrow inFIG. 6 ). From the viewpoint ofFIG. 6 , the space between theanti-dust structure 1646 and therotary surface 1622 a is the narrow passage mentioned above. An airflow induced due to the rotation of therotary surface 1622 a is subjected to a constraint by the narrow passage, and a little of the airflow can flow through the narrow passage and reach thesensing surface 1684 a. Therefore, the amount of dust deposited on thesensing surface 1684 a is efficiently reduced. It is added that in the embodiment, thesensing surface 1684 a is lower than an extension line (as shown by a dash line inFIG. 7 ) of thecurved surface 16462, which keeps the airflow that passes through the narrow passage from directly hitting thesensing surface 1684 a and reduces the amount of the dust deposited on thesensing surface 1684 a. - Please also refer to
FIG. 7 .FIG. 7 is a schematic diagram illustrating thecolor wheel module 16 in another viewpoint. InFIG. 7 , therotation device 162 and thecolor wheel 166 are omitted, and a distance between the guidingslot 16464 and therotary surface 1622 a is larger than that between thecurved surface 16462 and therotary surface 1622 a. A flowing resistance to the airflow flowing between the guidingslot 16464 and therotary surface 1622 a is relatively small, so that after entering the narrow passage formed by therotary surface 1622 a and thecurved surface 16462 with the guidingslot 16464, the airflow tends to flow between the guidingslot 16464 and therotary surface 1622 a. Furthermore, an extension line (as shown by a bold dashed line with an arrow inFIG. 7 ) of the guidingslot 16464 does not pass through thesensing surface 1684 a of theoptical sensor 1684. Therefore, in principle, the airflow flowing substantially in therotation direction 1622 b (indicated by a bold arrow inFIG. 7 ) between the guidingslot 16464 and therotary surface 1622 a will not impact on thesensing surface 1684 a after departing from the narrow passage; the dust contained in this airflow will not be deposited on thesensing surface 1684 a. In other words, because of the guiding effect of the guidingslot 16464 on the airflow having entered the narrow passage (formed between therotary surface 1622 a and thecurved surface 16462 with the guiding slot 16464), a little of the airflow will flow past thesensing surface 1684 a, and the amount of the dust deposited on thesensing surface 1684 a can be reduced further. The configuration of the guidingslot 16464 solves the problem in the prior art that the blocking structure does nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft. - In the embodiment, the
curved surface 16462 has afirst section 16462 a and asecond section 16462 b (of which the areas are indicated by dashed rectangles inFIG. 7 ) sequentially in therotation direction 1622 b. Thefirst section 16462 a and therotary surface 1622 a form afirst distance 16463 a therebetween. Thesecond section 16462 b and therotary surface 1622 a form asecond distance 16463 b therebetween. Thefirst distance 16463 a is larger than thesecond distance 16463 b. In practice, thecurved surface 16462 is disposed substantially parallel to therotary surface 1622 a. The distance between thecurved surface 16462 and therotary surface 1622 a varies gradually so as to reduce turbulence of the airflow. For this case, an average of the distance between thefirst section 16462 a and therotary surface 1622 a can be taken as the abovefirst distance 16463 a; an average of the distance between thesecond section 16462 b and therotary surface 1622 a can be taken as the abovesecond distance 16463 b. However, the invention is not limited thereto. As far as thecurved surface 16462 is concerned, thefirst distance 16463 a is larger than thesecond distance 16463 b, so the airflow that flows between thecurved surface 16462 and therotary surface 1622 a will be subjected to a higher flowing resistance at thesecond section 16462 b than at thefirst section 16462 a. The airflow largely tends to flow out from two opposite sides of thesecond section 16462 b when flowing at thesecond section 16462 b. In other words, a little of the airflow can pass through the narrow passage (formed between thecurved surface 16462 and therotary surface 1622 a), thesecond section 16462 b in therotation direction 1622 b, and reach thesensing surface 1684 a. Because the distance between thecurved surface 16462 and therotary surface 1622 a becomes narrow gradually, a little of the airflow having entered the narrow passage will flow above thesensing surface 1684 a, and the amount of the dust deposited on the sensing surface can be reduced further. Therefore, shortening the distance between thecurved surface 16462 and therotary surface 1622 a also solves the problem in the prior art that the blocking structure does nothing of reducing the deposition of dust to the airflow having entered between the blocking structure and the rotation shaft. - In the embodiment, the
anti-dust structure 1646 provides a dual effect on reducing the deposition of dust on thesensing surface 1684 a by the guidingslot 16464 and by gradually shortening the distance between thecurved surface 16462 and therotary surface 1622 a; however, the invention is not limited thereto. In practice, it is practicable to choose either one of the aforementioned features on the anti-dust structure. Furthermore, in practice, the longer the narrow passage formed between therotary surface 1622 a and thecurved surface 16462 with the guidingslot 16464 in therotation direction 1622 b, the better the guiding effect on the airflow having entered the narrow passage (i.e. avoiding the airflow impacting thesensing surface 1684 a). In the embodiment, thecurved surface 16462 extends in therotation direction 1622 b by at least 45 degrees; that is, thecurved surface 16462 covers therotary surface 1622 a in therotation direction 1622 b by at least 45 degrees. However, the invention is not limited thereto. In addition, in the embodiment, the guidingslot 16464 is wholly adjacent to and connects with thecurved surface 16462, but the invention is not limited thereto. As shown by FIG.FIG. 8 , in another embodiment, the guiding slot 16474 of theanti-dust structure 1647 is partially adjacent to thecurved surface 16462 and therefore connects with thefirst section 16462 a only. The other portion of the guiding slot 16474 extends in a direction diverging from therotation direction 1622 b and even from therotary surface 1622 a; that is, the other portion of the guiding slot 16474 does not face therotary surface 1622 a. This structural configuration leads the airflow, which departs from theanti-dust structure 1647 through the guiding slot 16474, to move far away from thesensing surface 1684 a; that is further reducing the influence of the airflow on thesensing surface 1684 a (e.g. the deposition of the dust, contained in the airflow, on thesensing surface 1684 a). - Please also refer to
FIG. 9 andFIG. 10 .FIG. 9 is a side view of the assembly of theoptical engine 14, thecolor wheel module 16, and theapparatus casing 10.FIG. 10 is a side view of thecolor wheel module 16. In the embodiment, the fixingpart 1644 has two lockingholes cover 1642 has alocking hole 1642 a disposed on the same axis as thelocking hole 1644 b; in the embodiment, the lockingholes housing 142 of theoptical engine 14 has two lockingholes color wheel module 16 is fixed to theoptical engine 14 by the lockingholes holes locking hole 1428 a of thehousing 142 at thefirst opening 1424; thelocking hole 1644 c is aligned with thelocking hole 1428 b in theaccommodating space 1422. In addition, thesecond opening 1426 is toward a bottom wall of theapparatus casing 10 and separately disposed from the bottom wall; that is, a gap exists therebetween, which is conducive to heat dissipation of thecolor wheel module 16. In the embodiment, the lockingholes FIG. 3 andFIG. 7 and by a cross mark inFIG. 10 ). A projection space 1650 (indicated by a column in dashed lines inFIG. 3 and shown as the area formed by the profile of the locking holes 1644 b and 1642 a inFIG. 10 ) is defined by thelocking hole center line 1648. Therotary part 1622 has arotation axis 1622 c passing through theprojection space 1650. In other words, a projection of therotation axis 1622 c on themount 164 in a direction parallel to thecenter line 1648 passes through the lockingholes housing 142 where the fixingpart 1644 is connected by the lockingholes rotary part 1622, is reduced so as to enhance the stability of the rotation of therotary part 1622 relative to theoptical engine 14. Furthermore, in the embodiment, therotation axis 1622 c also passes through a projection space (shown as the area by the profile of thelocking hole 1644 c inFIG. 10 ) formed by thelocking hole 1644 c extending along the center line 1649 (indicated by a cross mark inFIG. 10 ). Similarly, a torque to thehousing 142, which is produced due to the rotation of therotary part 1622, is reduced so as to enhance the stability of the rotation of therotary part 1622 relative to theoptical engine 14. Furthermore, the lockingholes rotation axis 1622 care disposed to be substantially coplanar (i.e. thecenter lines rotation axis 1622 c are coplanar), and the locking holes 1644 b, 1644 c and 1642 a are located at two opposite sides of therotary part 1622, so that thecolor wheel module 16 is firmly fixed by theoptical engine 14 and therotary part 1622 can stably rotate. - In addition, the
mount 164 has aside wall portion 1642 b formed by thecover 1642. After thecolor wheel module 16 is fixed on thehousing 142, theside wall portion 1642 b substantially seals thefirst opening 1424 of thehousing 142. It is added that in the embodiment, a gap allowing a fixing tool (e.g. a screwdriver) to pass through is formed between theside wall portion 1642 b and thefirst opening 1424 and facilitates the fixing of the fixingpart 1644 on thehousing 142 by thelocking hole 1644 c. In practice, if it is unnecessary for thecolor wheel module 16 to be fixed by thelocking hole 1644 c or by a fixing operation through thefirst opening 1424, theside wall portion 1642 b can be designed to seal thefirst opening 1424 completely for further improving the sealing of the accommodating space. - In the above embodiment, the
mount 164 is formed by a combination of parts, but the invention is not limited thereto. Please refer toFIG. 11 toFIG. 13 .FIG. 11 is an assembly drawing of anoptical engine 34, acolor wheel module 36 coupled to theoptical engine 34, and theprojection lens 18 of another embodiment according to the invention.FIG. 12 is an exploded view of the color wheel module and theoptical engine 34.FIG. 13 is a schematic diagram illustrating amount 364 of thecolor wheel module 36. Theoptical engine 34 and thecolor wheel module 36 are structurally similar to theoptical engine 14 and thecolor wheel module 16 in the above-mentioned embodiment respectively. Therefore, in principle, theoptical engine 34 and thecolor wheel module 36 use the component notations of theoptical engine 14 and thecolor wheel module 16. For other descriptions of theoptical engine 34 and thecolor wheel module 36, please refer to the relevant descriptions ofoptical engine 14 and thecolor wheel module 16 mentioned above; they will not be repeated. Furthermore, during interpretation of the following descriptions, please also refer to the relevant descriptions in the foregoing and the figures therefor, and they will not be repeated. In the embodiment, themount 364 of thecolor wheel module 36 is integrally formed in one piece, for example but not limited to a plastic injection part. Thereby, themount 364 as a whole can provide better precision, which can easily and precisely control the relative position of thecurved surface 16462 of theanti-dust structure 3646 of themount 364 and therotary surface 1622 a. - In the embodiment, the
anti-dust structure 3646 of themount 364 has aside surface 16476 and anaccommodating recess 16477. Theside surface 16476 is opposite to the color wheel 166 (shown by its profile in dashed lines inFIG. 13 ). Theaccommodating recess 16477 is formed on theside surface 16476. Thecolor wheel 166 covers at least a portion of theaccommodating recess 16477. Thereby, dust contained in an airflow induced between thecolor wheel 166 and theside surface 16476 due to the rotation of thecolor wheel 166 can be deposited in theaccommodating recess 16477, which is conducive to a reduction in the amount of the dust contained in the air inside theaccommodating space 1422. It is added that theanti-dust structure 1646 of thecolor wheel module 16 can be provided with a structure like theaccommodating recess 16477 and performs the same effect, which will not be repeated. - In addition, because the
mount 364 is integrally formed in one piece, thecontrol circuit 1682 of therotation sensing module 168 is fixed on themount 364 from the bottom thereof (in the viewpoint ofFIG. 13 ), and themount 364 has a throughhole 16478 corresponding to thecontrol circuit 1682 beside thecurved surface 16462, so theoptical sensor 1684 can be exposed through the throughhole 16478 for sensing the rotation of therotary surface 1622 a. In the embodiment, the optical sensor 1684 (indicated by dashed lines inFIG. 13 ) is located in the throughhole 16478. Thesensing surface 1684 a of theoptical sensor 1684 is lower than the opening edge of the throughhole 16478 and an extension of thecurved surface 16462, which keeps the airflow passing through the narrow passage from directly hitting thesensing surface 1684 a and also reduces the amount of the dust deposited on thesensing surface 1684 a. Furthermore, themount 364 has anaccommodating recess 16479 adjacent to the throughhole 16478 at one end of the guiding slot 16474. The airflow, passing through the narrow passage formed between theanti-dust structure 3646 and therotary surface 1622 a, flows out the narrow passage from the guiding slot 16474, so that the dust contained in the portion of the airflow can be deposited in theaccommodating recess 16479 and will not be spread in theaccommodating space 1422 by the portion of the airflow, which indirectly reduces the amount of the dust in the airflow induced by therotary surface 1622 a of therotary part 1622. - Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Claims (18)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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TW103130627A TWI533078B (en) | 2014-09-04 | 2014-09-04 | Projector and color wheel module thereof |
TW103130627A | 2014-09-04 | ||
TW103130627 | 2014-09-04 |
Publications (2)
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US20160070095A1 true US20160070095A1 (en) | 2016-03-10 |
US10197788B2 US10197788B2 (en) | 2019-02-05 |
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US14/845,280 Active 2036-02-09 US10197788B2 (en) | 2014-09-04 | 2015-09-04 | Projector |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20160195715A1 (en) * | 2015-01-07 | 2016-07-07 | Qisda Optronics (Suzhou) Co., Ltd. | Projector and color wheel module dust removing method |
CN109143721A (en) * | 2017-06-27 | 2019-01-04 | 新思考电机有限公司 | Tilting action device, photographic device, Optical devices and electronic equipment used for optical part |
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US20040145707A1 (en) * | 2002-11-21 | 2004-07-29 | Samsung Electronics Co., Ltd. | Color wheel fixing structure for projector |
US20080079909A1 (en) * | 2006-10-03 | 2008-04-03 | Delta Electronics, Inc. | Color wheel module for use in a projection apparatus |
US20130128237A1 (en) * | 2011-11-18 | 2013-05-23 | Hon Hai Precision Industry Co., Ltd. | Dust-proof structure of projector |
US20150085260A1 (en) * | 2013-09-26 | 2015-03-26 | Coretronic Corporation | Color wheel module and projection apparatus |
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CN101957174B (en) | 2010-04-18 | 2012-05-09 | 苏州佳世达光电有限公司 | Optical sensing device with antidusting structure, light filter and projector |
CN103257516A (en) | 2013-05-02 | 2013-08-21 | 苏州佳世达光电有限公司 | Projector |
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2014
- 2014-09-04 TW TW103130627A patent/TWI533078B/en not_active IP Right Cessation
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2015
- 2015-09-04 US US14/845,280 patent/US10197788B2/en active Active
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US20040145707A1 (en) * | 2002-11-21 | 2004-07-29 | Samsung Electronics Co., Ltd. | Color wheel fixing structure for projector |
US20080079909A1 (en) * | 2006-10-03 | 2008-04-03 | Delta Electronics, Inc. | Color wheel module for use in a projection apparatus |
US20130128237A1 (en) * | 2011-11-18 | 2013-05-23 | Hon Hai Precision Industry Co., Ltd. | Dust-proof structure of projector |
US20150085260A1 (en) * | 2013-09-26 | 2015-03-26 | Coretronic Corporation | Color wheel module and projection apparatus |
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US20160195715A1 (en) * | 2015-01-07 | 2016-07-07 | Qisda Optronics (Suzhou) Co., Ltd. | Projector and color wheel module dust removing method |
US9638915B2 (en) * | 2015-01-07 | 2017-05-02 | Qisda Optronics (Suzhou) Co., Ltd. | Projector and color wheel module dust removing method |
CN109143721A (en) * | 2017-06-27 | 2019-01-04 | 新思考电机有限公司 | Tilting action device, photographic device, Optical devices and electronic equipment used for optical part |
Also Published As
Publication number | Publication date |
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TW201610548A (en) | 2016-03-16 |
TWI533078B (en) | 2016-05-11 |
US10197788B2 (en) | 2019-02-05 |
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